Typewriting machine



Oct 22, 1929 J. wALDHl-:IM 1,732,920

TYPEWRITING MACHINE Filed May ze, 1925 4 sheets-sheet 1 TOP VIEW Oct.22, 1929. J. WALDHEIM 1,732,920

TYPEWRITING MACHINE Filed May 29. 1925 4 Sheets-Sheet 2 oct. 22, 1929.J, wALDHElM 1,732,920

TYPEWRITING MACHINE Fiied May 29, 1925 4 sheets-sheet 3 OGL 22 1929 J.WALDHEIM 1,732,920

TYPEWRI TING MACHINE Filed May 29 1925 4 Sheets-Sheet 4 Aff@ ' PatentedOct. 22, 1929` Y UNITE-D STATES PATENT OFFICE JOHN WALDHEIH, OFELIZABETH, NEW JERSE'Y, ASSIGNOR TO UNDERWOOD ELLIOTT FISHER COMPANY, OFNEW YORK, N. YL', A CORPORATION OF DELAWARE TYPEWRITING MACHINEApplication lcd Hay 29,

In the atents to McLaughlin, No. 1,488,- 453 and orcoran, N o.1,509,828, is shown a standard Underwood typewriting machine comprisinga base or framework portion with an overhan ing paper-carriagethereon,the framework eing encased in a pack which includes walls of sheet-metaland linings of4 felt or other sound-absorbing material; said pack notonly damplening the vibrations of the framework at t e operation of themachine, but also serving as` an air-pocket absorbing sound-vibrations.

One of the features of the present inven, tion is the rovision of anoverhead soundsubduing c amber or pocket co-operative with sald pack anddirectly enclosing the paper-carriage. In designing said overheadpocket, compactness has b eensought, and also ready adaptability totypewriting machines of standard construction. To secure these ends andto provide an overhead air-pocket which will co-operate eciently withsaid framework pack, said carriage-pocket is designed totravel with thecarriage, and for this purpose is of light construction, and also in thepreferred form has provision for the accommodation of the work-sheets atthe rear of the carriage. This overhead pocket comprises top, slde,front and rear walls, and sets down over the carriage, being open at thebottom to co-operate with said pack in confining and absorbing sound ofoperation.

While said'overhead pocket or carriage enclosure is shown in thepreferred form in combination with a machine-frame pack, still theinvention is not limited in all cases to the use of a pack.

lin using sound-deadening typewritercabinets, in which a capacious baseis closed by a wide cover, it has been found that such cabinets cannotbe conveniently used in the regular drop-top typewriter-desks, because'of their carriage-accommodating extensions, which overhang the cabinetsat the sides, and prevent the lowering of the cabinets into the desks.

To avoid such an objection, the pack and carriage-enclosure arepreferably made in separate units, the pack fitting the frame of themachine, and the canopy over the car- 1925. Serial N0. 331,600.

riage being borne by or travelin with the carriage, and being made of sustantially the same width. This effects a reduction of the spacerequired, and, when the carriage is centered relatively to themachine-frame, it may be dropped into the desk-compartment.

The carriage pocket or casing is pivotally mounted at the rear of thecarria e and is swingable upwardly and rearwarty, away from the platen,to render the work-sheet accessible and to facilitate the manipulationthereof. However, when the work-sheet is placed around the platen, thecarriage is operable from the outside of the casing, provision bemg madefor the protrusion of the carriage-control levers to the outside of thepocket. In this manner it ispossible to return and line-space thecarriage and to release the same, and also to rotate the platen by thehand-wheels independently of .the line-space lever while the carriageremains encased. The construction of the carria e- -enclosing casing'permits the use of an nderwood standard typewriting machine with noalteration thereof. It has been customary to extend the carriage-controllever to the outside of the usual cabinet through cushionsealed slots, afeature which involved the changing of the carriage-control lever.

The carriage-casing is preferably provided with a rear auxiliary pocketto receive the overhanging portion of the work-sheet.

The pack is provided with a front plate fast to the machine-frame andthe plate has an arcuate opening in front of the typebasket. The openingis provided with a detachable closure secured to the plate by means ofclips. The top of the frame is also completely covered or closed againstthe emission of sound-waves, except for an opening necessary to connectthe carriage and its operating mechanism in the machine-frame.

Said top closure serves' as a lower closure for the carriage-casing whenthe same is in its central position.

rlhe carriage-casing is provided withl an openin to render thework-sheet visible at the printing point. Said opening may be closed by.a glass plate.

In the preferred form of the present in- `vention, the main frame of themachine is enclosed by a sin le unit, pack or shoe having a Hoor, sidewa ls and a rear wall. There is also provided a front wall which may bemounted on the front of the main frame to form a front closure. 4A casinis provided which extends over the t pewrlter-carriage, and itisprovided with si e walls, a rear wall and a front wall, saidcarriage-casing being pivotally supported in one orm/ of the invent-ionon brackets secured to the carria e of the machine. The top edges of thesi e walls of the pack conform substantially in outline to the outlineof the lower edges of the side walls of the carriage-casing, and extendclosely toward each other to minimize the escape of sound from the sidesof the machine.

rIhere is also'provided a partition which forms the ceiling of the packand forms the floor of a chambervformed by the carriagecasing. Thispartition ma be composed of individual sections, one o which is hereindisclosed as attached to the removable front plate, the other sectionsbeing supported directly on the main frame of the machine.

casing, instead of being supported bSaid cover and said partition arelall lined with felt to'absorb the sound-waves. p

It will be understood that the pack with said partition may be used to afair degree of sound-muliiing efficiency without the carriage-casing,and that the latter may be used with the partition to a fair degree ofellicienc without the pack, and, further, that the pac may be used withthe carriage-casing without said partition. A higher de ree ofsoundmuiing efficiency is produce however, by using the three elements,namely, pack, partition and carriage-casing in combmation.

The carriage-casing is constructed so as to expose the usualplaten-rotating knobs, the line-space handle, the carriage-returnlingerpiece and the carriage-release handle, so that said linger-piecesma be manipulated while the casing is in its e ective position over thecarriage. To this end, the side walls of the*v casing are provided withcutouts through which the platen-shaft extends, upon the ends of whichshaft the linger-pieces are mounted outside of the casing. The forwardcorners of said casing are indented to 'expose' at one side theline-space handle and at the other side vthe carriage-returnlinger-piece and the carriage-release handle, so that they may bemanipulated While the casing remains in its effective position.

The casing is provided at its rear end with an auxiliary pocket toreceive the overhanging end of a work-sheet extending from the platen ofthe machine. This auxiliary pocket may be closed at the bottom and -iscurved to cause the aper to curl up within said pocket.

In one orm of the invention, the carriageon the typewriter-carriage, issupported on a subrear of the pack. In this form the sub-carriage isprovided with an auxiliary pocket to form av continuation of thepaper-pocket on the cover, in which the work-sheet hangs.` A connectingbar, extendingfbetween the typewriter-carriage and the sub-carriage,causes said carriages to travel in unison.

Other features and advantages will hereinafter appear.

In the accompanyin drawings,

Figure 1 is a front Vlew, in elevation, of an Underwood standard tyewriting machine enclosed inthesound-deadening casing.

Figure 2 is a side elevation of the machine, showing the casing partlyin cross-section, the cover-part being shown 1n dot-and-dash lines inits open or displaced position.

Figure 3 is a detail showing the carriageoperating levers and a portionof the coverpart of the casing. ,y

Figure ltis a perspective view of the machine-carriage and the covertherefor.

Figure 5 is aperspective view of the pack for enclosing the frame of themachine (not shown). l

Figure 6 is a plan'view ofthe top closure of the body-part, showing themachine with the carriage removed.

Figure 7 is a side View of the machine,

lshowing a portionl of the pack and the top opening-at the rear thereoffor the overhanglng portion of the` work-sheet..

Figure l0 is airear view of a modified form 'of the invention shown inFigure 11.

Figure 11 is a side view, in elevation, of the casm and the machineenclosed therein, showmg a modified form of the 1nvention in which thecarriage-cabinet is borne by rails fast to the pack or body-part.

, The Underwood standard typewriting machine includes a frame 10supported by feet 11.-l Extending forwardly from said frame there isprovided a keyboard-extension 12, in `which there are `mounted banks ofkeys 13, said keys being depressible to swing typebars 14, designed tostrike a platen 15, around which there is provided a work-sheet 16. The

vplaten is shiftably mounted on a platen-frame 17 borne by a carriage18, and the carriage is mounted upon rails 19 and is disposed forletter-space travel at each key-depression.

In order to control the movement of the carriage and the platen, thereare provided a line-space lever 20, effective to return the carriagewhile line-spacingthe platen, a carriagerelease lever 21, effective todisconnect the carriage from the escapement-mechanism (not shown), and acarriage-return fingerarising from the operation of the machine, the

frame 10 is enclosed within a pack comprising a bottom wall or sole 22,two side walls 23 closely fitting the frame of the machine at the sidesthereof, and a rear wall 24 also closely fitting the frame. At the frontthe pack 1s open to clear the keyboard-extension except for a low wall25 under the keyboard..

The frame of the Underwood machine is provided with o enings 26, both atthe sides andV at the rear t ereof, for the purpose of rendering themechanism in the frame more accessible. In this invention, the casing isprovided With a felt lining A27 for the purpose of closing said openingsAand to absorb or deaden the sound as nearas possible to its source. Thetop of the frame is also provided with a felt closure to prevent theemission of sound through openings at the top, clearance being providedfor the free operation of some of the partsof the mechanism whichprotrude therethrou h' to support' and control the carriage. As. s ownin Figure 5, the top closure comprises two rear plates, two

side plates and two lfront plates. The left-r hand rear top closure,indicated by the numeral 28, is`inserted from the rear of themachine andis clamped to the frame 10 by means' of tabs -29 projecting downwardlyfrom `a t frame 30, to Whlch there is secured a piece of sound-deadeningmaterial indicated by the numeral 31. At the center ofthe'sound-deadening material there -is provided an opening or window 32through which the carriagereturn band 33 of the machine is passed. Theright-hand rear' top closurej34 comprises a frame 35 secured tothe-'frame of the machine by means of a screw 36, to lwhich thecarriagereturnband is secured.. A felt piece 37, having holes 38 and 39res ectively designed ltoI clear the back-space lin 40 and theribbonshift connecting link 41, is glued or otherwise secured to theframe 35, the frame and the felt piece being provided with an openslot'42 v for the purpose offclearingv the 4tabulating key mechanism 43.v\

To further enclose the upper ortion of the frame, there are provided enclosures 44. Said closures comprise frames 45 and felt pieces 46 fastthereto. Said vpieces are secured to the machine by means'. ofinwardlybent tabs'47 projecting from downwardlyextending ribs 48, thetabs 47 engaging an opening in the frame. The end closures are alsoprovided with clearance openings 49 for the ribbonspool shafts 50.

At the front, the opening overlying the type-basket is provided withanother closure 5l, also comprising a frame 52v and a felt piece 53 fastto the frame. The freine is provided with slots 54 to clear theribbon-feed mechanism, and also with .a clearance cutout 55 for thetype-bars. The frame is reinforced by means of cross-ribs 56, and has anarcuate t rear edge 57 to close as muchas possible'of the opening overthe type-bars.

The front opening of the machine-framev is provided with a plate 58secured thereto gy means of screws 59 fitting into holes 60.

his plate is substituted for the regular front plate ofthe Underwoodmachine which is vdesigned to protect the mechanism within the frame.Said plate is also provided with an arcuate opening 61 in front ofthetype-bars to facilitate the cleaning thereof. In this invention, thereis provided a front closure comprising a plate 62 and a felt lining 63.The plate is designed to overlap the opening and 1s provided withinwardly bent tabs 64 engaging the plate 58 to thus support the closurethereon. In order to facilitate the vremoval of the front closure thereis provided a finger-piece 65 fast to the plate 62.

The carriage-cabinet is illustrated in its .preferred form in Figures 1,2, 3 and 4, andl comprises side walls 66 forming an integral part of anarcuate top 67 which extends rear- '.Wardly and downwardly at 68,vforming a wardly from the carriage to. lower the fulcrum oint ofthecabinet. In order to facilitate t e assembling of the cabinet upon thecarriage, there are provided fulcrum 'studs 72 having on each a reducedportion 73, at the ends thereof, engaging with holes in the brackets 70.The studs are screwed into a tapped hole 74 in the sides of the cabinet.

One of the features of this invention is that the carriage of themachine is completely operable from the outside of the cabinet, and, tothis end, provision is made for the prot-rusion to the outside of thecabinet of the linespace lever 20, the carriage-release lever 21 .andthe finger-wheels 75 at the ends of the platen 15. In this manner it ispossible to completely manipulate the work-sheet during the typingoperation except for the replacement of the work-sheet, in which casethe cabinet is swung rearwardly awayfrom the platen and is held in anopen position as shown in dotand-dash lines in Figure 2 by its ownweight and by the action of balancing springs v76. The springs 76 areoperatively mounted between two studs 77 and 78, the former fast to thebrackets 70 and the latter fast to the side walls of the lcabinet toassist, by their closing tension, to both open the cabinet and hold 'Aisc of a transparent late to revent the emission of sound t erethrougThe plate is preferably made of glass and is secured to the sible of thecarriage, and at the same time it is desirable to render thecarriage-control levers accessible without displacing the cabi-' net,there is provided a cut-away portion at each side of the opening 79 tothus clear the carriage-control levers and permit their operation. Thecut-away portion is enclosed by front walls 86 andside "walls`87, thelatter conforming to the side guard of the carriage. At. the rear,thecabinet .extends downwardly and forwardly, forming a curvate wall 88,

which wall extends again upwardly, forming a straight wall 89substantially parallel to the rear wall 68, and terminates with anedge90 partly cut away to clear some of the mechanism when the cabinetis swung to an open or f displaced position. To further deaden theIsounds arising from the operation of the machine, the carriage-cabinetis provided with a lining of sound-deadening material, indicatedgenerally bythe numeral 91. f

In another form of this invention, the carriage-cabinet is provided withan opening v92 at the rear for the overhanging portion-'of thework-sheet. Said formv of the invention is illustrated in Figure 9.

In order to relieve the `carriage from the weight of the cabinet, thereis provided mechanism in another form of the invention illustrated inFigures 10'and 11. Said mechanism comprises a rail 93 fast to the rearwall 24 of the pack, upon which iail there` is mounted a box-likememberl 94 disposed for lateral travel therealong. The member 94 isprovided with wheels 95 revolubly mounted thereon, the wheels having aV-shaped periphery engaging with rounded edges 96 of the rail 93. Inthis manner the friction of the wheels upon the rail is reduced to aminimum and at the same time the member 94 is slldv ably positioned onthe rail. The member is provided with a lining 97 of sound-deadeningmaterial and comprises end walls 98 provided with studs 99 upon whichthe cabinet is rockably mounted.

Thecabinet in this case is not supported by the carriage at 100 as inthe preferred form, but is su ported uponv its rear end, the wholeweight t ereof being borne by the member 94. It will be noted in thisconnection that the sides of the cabinet are provided with clearancecuts 101 to clear the platen-axle 102 when v the platen is shifted to,upV er-case position. The modified form of the invention is illustratedin Figure 11, in which the cabinet is shown in both closed or yeffectiveand open n positions,.the latterplpsition being 'shown in here are alsoprovided dot-and-.dash lines.. y compensating springs 103 to assist indisplacing -the cover which is held in its open position b its ownweight holding lthe sides of the ca inet against studs 104 projectingfrom the member 94, upon which studs one of the lends of thesprings7l103' is anchored. The

other ends of t e'springs' are secured to studs 105 fast to the ,sidewalls of the cabinet. The weight of the cabinet is borne bypins 106 fastto the member 94, and the front portion of the cabinet hangs over thecarriage.

In order to drive the cabinet and its supporting member 94 along withthe carriage,

there is provided a connecting piece 107 se-v land is fastened'to'thejrearfwall fof the pack tend the carria e-control levers to theexterior 'of the soundroofcasingfthrough openings in front thereof....Saidv levers had to be elongated in order to facilitate the operationfrom 4the outside o f the casing. .Inithis invention,

owing tothe manner iii-whichv the carriagecabinetis designed, vit ispossible to use the same levers as provided inthe Underwood machine,thus eliminating the cost of replacing the levers.

` 'Variations maybe resorted to within the scope of the invention, andportions of the improvements may be used without others.

Having thus described my invention, I claim: y

1. The combination with a typewriting machine, including a main frameand a carriage, of a sound-muling device, said device including a casingto enclose the frame of the machine, a casing to substantially enclosethe carriage, and sound-muiiling means arranged under the carriage andabove the main frame, said sound-muiing means forming a substantiallclosed ceiling for the frame-casing and a su stantially closed floor`for the carriagecasing. n

- 2. The combination with a typewriting machine, includinga mai-n frameand a carriage, of a sound-mutiling device, said device including acasing to enclose the frame of the machine, a casing to substantiallyenclose the carriage, and sound-muiliing means arranged under thecarriage and above the main frame, said sound-muling means forming asubstantiall closed ceiling for the frame-casing and a su stantiallyclosed floorforthe carria ecasin ,said carriage-casing beingarrange totrave with saidcarriage. v

3. The combination with a typewriting machine, including a main frameand a carriage, of a sound-mailling device, said device v1ncluding acasing to enclose the frame of the machine, a casing to substantiallyenclose the carriage, and sound-muiiting means arranged under thecarriziiige and above the main frame, said sound-mu ing means forming asubstantially closed ceiling for the frame-casing anda substantiallyclosed door for the carriage-casing, said carriage-casing being suported on said carriage to travel therewit 4. The combination with atypewritingv machine, including a main frame and acarriage, of asound-muhng device, said device including a casing to enclose the frameof the machine, a casin to substantially enclose the carriage an totravel with said carriage, and a paper-pocket at the rear ofy saidcarriage-casing to receive the -overhanging` end of a work-sheetfromthecarriage.

5. The combination with a typewriting machine, including a carriagehaving a 'finger-piece thereon, of sound-muling means including a coverfor said carriage .to travel with said carriage, said cover having anindentation at one of its cornersv to 'expose the finger-piece, so thatsaid fingen-piece may be manipulated while the cover is in its effectiveposition.

6. The lcombination with a typewriting machine, including a carriagehaving a linespace lever at one end and a carriage-release lever at theother end thereof, of sound-mufling means including a cover for saidcarriage to travel with said carriage, said cover having indentedcorners at its forward end,

the line-space lever projecting from the carriage into one indentedcorner and the carriage-release lever projecting into the other corner,so that both levers may be independently operated while the cover is inits effective position.

7. The combination with a typewriting machine, including a carriage anda platen on said carriage, of sound-mufliing means including a cover forsaid carriage and mounted to travel therewith, said cover including arear wall terminating at a sheet-deflecting pocket to receive the end ofa work-sheet overhanging the platen. K

8. The combination with a typewriting machine, including a carriage anda platen on said carriage, of sound-mutiling means including a cover forsaid carriage and mounted to travel therewith, and a pocket at the rearof said cover, travelling with the same,

to'receive the overhanging endl of .a worksheet on said platen.

.-rangedabove the type-bars.

9. The combination with a typewriting machine, including a main frameand a carriage having standard carriage controlling means, of asound-muliling device including a casing to enclose the main frame, anda. cover having side walls for said carriage,

said cover being mounted to travel with said vcarriage over theframe-casing, said side walls on said cover having recesses Ythroughwhich the carriage-controlling means projects to enable the carriagebeing-wholly controlled from the exteriorof the casing. l

.f 101. The combination with a visible type# l writing machine having acarriage and `gerieces on said carriage, of a lcover extending over saidcarriage and v traveling therewith, said cover h ving indentations atits forward corners to expose said linger- ,1

pieces, anda window between .said indentations through which theprinting point may be observed.

11. The combination with a typewritizi;`

machine having a carriage and a' platen on said carriage, ofsound-muilling means 1ncluding a cover for enclosing said carriage andmounted to travel therewith, said cov `r including a rear wall formedinto an enclosing pocket to accommodate the overhanging vend of awork-sheet extending from the platen. y

12.. The combination with a typewriting machine, including a carriage,of sound-muffling means including a cover for said car# riage, saidcover having a pocket at its -rear end and extending downward from saidcarriage, and brackets on said carriage, said4 at the sides, front, backand bottom, and a plurality of closure devices to substantially closethe top of said casing, said closure devices being located insubstantially parallel planes at the top of said frame and uniformlybelow said carriage, forming a-soundbale therebetween.

14. The combination with a typewriting machine, including a main frame,a front plate thereon supported thereby. a carriage, a platen on saidcarriage, and type-bars to print againstsaid platen, of sound-muilingmeans including a casing-to enclose the main -frame at the sides, backand'bottom, and a plurality of closure devices to 'substantially closethe top of said casing, said closure devicesbeing locatedA insubstantially parallel planes at the top of said frame and uniformlybelow said carriage to form a sound-baille therebetween, one of saidclosure devices being supported by said front plate and ar- 15. Incombination with a typewriting machine having a platen and a carriage, asounddeadening hood movable with andv enclosing said carriage, andpivotal means ori the carriage for rendering the hooddisplaceablebetween fixed stop ositionsjfor `facilitatin the manipulation o awork-sheet aroun -the platen. p

16. In combination with a typewriting madeadem'ng cover movable withandenclosing said carriage, and l meansv `for rendering" `the coverdisplaceable awayfrom `said Iplatenfor facilitating the manipulation ofa worksheet, said cover including endwalls forxnin an integral part of acurvate top, and sai top extending rearwardly and'downwardly and`forming a pocket for receiving the'unuscd,

portion of the work-sheet and vproviding a pivotal position for thecover. q v

17. In combination with a typewriting machine having a platen and acarriage, a sounddeadening cabinet wholly supported by vsaid carriage,and means for rendering the cabinet displaceable for facilitating themanipulation of a work-sheet, said means including brackets fast to thecarriage to pivotally sup-v port the cabinet andstuds in the side wallsof the cabinet to limit the movement thereof in two directions. s

18. In a typewritin machine having a carriage, a laten shiftab y mountedon said car mage, a ever for line-spacing the platen and for returningthe carriage, carriage-feedingv mechanism, a lever for disconnecting thecarriage from said feeding mechanism, and finer-wheels for rotating theplaten, a soundeadenin hood wholly supported by the carriage, sai hoodcompletely enclosing said carriage except orthe platen and carriagecontrol levers and for the platen-rotating wheels, and said hood .beingpivotally mounted on the carriage in a manner to afford the displacementof the hood away from the platen and from said platen and carriagecontrolling means, for rendering the platen accessi.

ble'and for manipulating a work-sheet.

19. In a typewriting machine having a traveling carriage and a framesupporting the same, rigid noise-miiling means 'including a sound-balilearranged below said carriage in order to lie between the same and said ymachine having a traveling carriage mounted on a frame, ofsound-muiiling means including a pair of relatively stationary baflie-'G- walls arranged beneath and above said frame,

respectively, the latter being located between said frame and carriage,in order to acoustically isolate one from the other, and a thirdbaliie-wall superposed in spaced manner above the upper frame-baille soas to overlie said carriage and travel therewith.

from said window for receivin [vof a work-sheet riage.

chine having a platen land acarriage, asoundl l x mounted on a frame andprovide ger-pieces, of a cover for the carriage to travel therewith .andnormally provided rearwardly `with a: poc

22. The combination'with a visible type- ,writing machine having atravelin envelo e the same, et to receive thefoverhang of a work-webfrom said carriage, and provided forwardly with a window for viewing theprinting point and with indentations on both lsides of said window toexpose said finger-pieces for manipulation.

23. In a typewriting machine having a frame, a key-board and a travelingcarriage, the combination with a sound-mulling casing completelyenclosing said frame while exposing the keyboard, a sound-mullingenclosing cover associated with said carriage in such manner as tolenvelope the same and travel therewith, and an intermediate stationarybaffle-means secured to the frame t`o acoustically divide said casingfrom said carriage-cover to constitute said casing and said cover as twoacoustically isolated units.

24. In a ty ewriting machine having a frame, the com ination with atraveling car-A r1age,of a sound-mutlling cover for enclosing saidcarriage, and means to render the cover displaceable and to hold thesaine in regisom said car- `carriage with finter with the carriage so asto travel therewith,

including a rearward pocket forming part of said cover, and rigidprojections associated with said carriage in such manner as to extendinto said pocket and pivotally support said cover within said pocket.

25. In a typewriting machine having a frame and a traveling carriagethereon, the combination with a soundmuliling casing for enclosing saidframe, a pivotally mounted sound-muiling cover enveloping said carriagein such manner as to travel therewith and to be relatively displaceablein order to completely expose said carriage, and an auxiliarysound-baille on said frame interposed between the same and said carriageto acoustically isolate the frame-casing from said carriage-cover.

JOHN WALDHEIM.

